Weather in Edmonton in September 2025
Average weather
Average temperature in Edmonton in September
The temperature in September is +21°C on average, with a range between a maximum of +26°C during the day and a minimum of -3°C at night.
The average maximum temperature goes down 52% by the end of the month, compared with the beginning of the month, from +24°C to +9°C.
Is Edmonton warm or cold in September?
Edmonton is typically mild in September.
Maximum temperatures go down compared to the previous month from +23°C to +18°C. The minimum temperature also goes down from +11°C to +6°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Edmonton:
Climate in Edmonton in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +18°C | +11°C | ||||
| Min. temperature | ||||||
| -1°C | -7°C | -24°C | ||||
| Max. temperature | ||||||
| +35°C | +33°C | +28°C | ||||
| Rainfall | ||||||
| 67 mm | 42 mm | 16 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 68% | 67% | 66% | ||||
| Air pressure | ||||||
| 1013 HPa | 1013 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 7 | 7 | 7 | ||||
| Cloudy days | ||||||
| 7 | 10 | 13 | ||||
| Rainy days | ||||||
| 15 | 12 | 8 | ||||
| Snowy days | ||||||
| 0 | 1 | 4 | ||||
September weather is still as good as in August. It’s getting colder in September. From +23°C in the day, the average maximum temperature lowers to +18°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 67 mm to 42 mm. It feels drier, as humidity decreases from 68% to 67%. Winds are stronger in comparison to August, going up from 2 m/s to 3 m/s on average. The amount of sunny days stay about the same, averaging 7 sunny days during the month.
October brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Edmonton is gradually decreasing during September, going from 2 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Edmonton?
Climate Change over Years
The climate in Edmonton in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+6°C) and the highest in 2023 (+12°C). The driest year was 2002 with only 185 mm of rainfall, and the wettest year was 2020 with 848 mm.
FAQ
Is September a good time to visit Edmonton?
Can you sunbathe in Edmonton in September?
Is Edmonton rainy in September?
Is it sunny in Edmonton in September?
Other cities in Canada
Monthly weather in Edmonton
Source of the data
For this page, we’ve looked at the typical weather in Edmonton, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.